diff --git a/lib/flow.js b/lib/flow.js
index 3f3897da..a96e34b3 100644
--- a/lib/flow.js
+++ b/lib/flow.js
@@ -10,7 +10,7 @@ declare type AuthResultType = {
 } | null;
 
 declare type CredentialType = {
-  provider: string,
+  providerId: string,
   token: string,
   secret: string
 };